netdev - [PATCH mlx5-next 05/14] net/mlx5: Lag, set active ports if support bypass port select flow table

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Date:   Wed,  7 Sep 2022 16:36:27 -0700
From:   Saeed Mahameed <saeed@...nel.org>
To:     Saeed Mahameed <saeedm@...dia.com>,
        Leon Romanovsky <leonro@...dia.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Eric Dumazet <edumazet@...gle.com>, netdev@...r.kernel.org,
        Tariq Toukan <tariqt@...dia.com>,
        Jason Gunthorpe <jgg@...dia.com>, linux-rdma@...r.kernel.org,
        "Liu, Changcheng" <jerrliu@...dia.com>, Liu@...r.kernel.org,
        Mark Bloch <mbloch@...dia.com>
Subject: [PATCH mlx5-next 05/14] net/mlx5: Lag, set active ports if support bypass port select flow table

From: "Liu, Changcheng" <jerrliu@...dia.com>

active_port bit mask indicates the current active ports. Set bit indicates
the port is active. Update active ports info to FW to redirect the QP/TIS
from inactive ports to other ports.

Signed-off-by: Liu, Changcheng <jerrliu@...dia.com>
Reviewed-by: Mark Bloch <mbloch@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 .../net/ethernet/mellanox/mlx5/core/lag/lag.c | 58 ++++++++++++++++++-
 1 file changed, 55 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c b/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c
index 26c7f72403eb..d4d4d1d1e8c7 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c
@@ -65,6 +65,21 @@ static int get_port_sel_mode(enum mlx5_lag_mode mode, unsigned long flags)
 	return MLX5_LAG_PORT_SELECT_MODE_QUEUE_AFFINITY;
 }
 
+static u8 lag_active_port_bits(struct mlx5_lag *ldev)
+{
+	u8 enabled_ports[MLX5_MAX_PORTS] = {};
+	u8 active_port = 0;
+	int num_enabled;
+	int idx;
+
+	mlx5_infer_tx_enabled(&ldev->tracker, ldev->ports, enabled_ports,
+			      &num_enabled);
+	for (idx = 0; idx < num_enabled; idx++)
+		active_port |= BIT_MASK(enabled_ports[idx]);
+
+	return active_port;
+}
+
 static int mlx5_cmd_create_lag(struct mlx5_core_dev *dev, u8 *ports, int mode,
 			       unsigned long flags)
 {
@@ -77,9 +92,21 @@ static int mlx5_cmd_create_lag(struct mlx5_core_dev *dev, u8 *ports, int mode,
 	lag_ctx = MLX5_ADDR_OF(create_lag_in, in, ctx);
 	MLX5_SET(create_lag_in, in, opcode, MLX5_CMD_OP_CREATE_LAG);
 	MLX5_SET(lagc, lag_ctx, fdb_selection_mode, fdb_sel_mode);
-	if (port_sel_mode == MLX5_LAG_PORT_SELECT_MODE_QUEUE_AFFINITY) {
+
+	switch (port_sel_mode) {
+	case MLX5_LAG_PORT_SELECT_MODE_QUEUE_AFFINITY:
 		MLX5_SET(lagc, lag_ctx, tx_remap_affinity_1, ports[0]);
 		MLX5_SET(lagc, lag_ctx, tx_remap_affinity_2, ports[1]);
+		break;
+	case MLX5_LAG_PORT_SELECT_MODE_PORT_SELECT_FT:
+		if (!MLX5_CAP_PORT_SELECTION(dev, port_select_flow_table_bypass))
+			break;
+
+		MLX5_SET(lagc, lag_ctx, active_port,
+			 lag_active_port_bits(mlx5_lag_dev(dev)));
+		break;
+	default:
+		break;
 	}
 	MLX5_SET(lagc, lag_ctx, port_select_mode, port_sel_mode);
 
@@ -386,12 +413,37 @@ static void mlx5_lag_drop_rule_setup(struct mlx5_lag *ldev,
 	}
 }
 
+static int mlx5_cmd_modify_active_port(struct mlx5_core_dev *dev, u8 ports)
+{
+	u32 in[MLX5_ST_SZ_DW(modify_lag_in)] = {};
+	void *lag_ctx;
+
+	lag_ctx = MLX5_ADDR_OF(modify_lag_in, in, ctx);
+
+	MLX5_SET(modify_lag_in, in, opcode, MLX5_CMD_OP_MODIFY_LAG);
+	MLX5_SET(modify_lag_in, in, field_select, 0x2);
+
+	MLX5_SET(lagc, lag_ctx, active_port, ports);
+
+	return mlx5_cmd_exec_in(dev, modify_lag, in);
+}
+
 static int _mlx5_modify_lag(struct mlx5_lag *ldev, u8 *ports)
 {
 	struct mlx5_core_dev *dev0 = ldev->pf[MLX5_LAG_P1].dev;
+	u8 active_ports;
+	int ret;
 
-	if (test_bit(MLX5_LAG_MODE_FLAG_HASH_BASED, &ldev->mode_flags))
-		return mlx5_lag_port_sel_modify(ldev, ports);
+	if (test_bit(MLX5_LAG_MODE_FLAG_HASH_BASED, &ldev->mode_flags)) {
+		ret = mlx5_lag_port_sel_modify(ldev, ports);
+		if (ret ||
+		    !MLX5_CAP_PORT_SELECTION(dev0, port_select_flow_table_bypass))
+			return ret;
+
+		active_ports = lag_active_port_bits(ldev);
+
+		return mlx5_cmd_modify_active_port(dev0, active_ports);
+	}
 	return mlx5_cmd_modify_lag(dev0, ldev->ports, ports);
 }
 
-- 
2.37.2